Please Help-Converting Trouble

I am new to this converting stuff. I have a Sansa View (8gb). I am trying to convert MP4 and WMV. Keep that in mind.

When ever I try to convert using the Sansa Media Converter it close out as soon as it starts converting. A window comes up and says that an error has occured. Any other software suggestons would be cool. I am also currently try All Video Converter but I am not sure what type of file it needs to be converted to, to work on Sansa.

Message Edited by me on 12-27-2007 08:40 PM